<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix" >
                <li >
                  <a title="全部课程" @click="initCourseFirst()" href="#">全部</a>
                </li>
                <li v-for="(item,index) in subjcetNestedList" :key="index">
                  <a :title="item.title" @click="searchOne(item.id,index)" :class="{active:oneIndex==index}" href="#">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul >

                <li class="clearfix" v-for="(item,index) in subSubjectList" :key="index">
                  <a :title="item.title" @click="searchTwo(item.id,index)" :class="{active:twoIndex==index}" href="#">{{item.title}}</a>
                </li>

              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange':courseFrountVo.buyCountSort!=''}">
                <a title="关注度" @click="searchBuyCount()" href="#">关注度&nbsp;
                  <span :class="{hide:courseFrountVo.buyCountSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':courseFrountVo.gmtCreateSort!=''}">
                <a title="最新" @click="searchGmtCreate()" href="#">最新&nbsp;
                  <span :class="{hide:courseFrountVo.gmtCreateSort==''}">↓</span>
                </a>
              </li >
              <li :class="{'current bg-orange':courseFrountVo.priceSort!=''}">
                <a title="价格" @click="searchPrice()" href="#">价格&nbsp;
                  <span :class="{hide:courseFrountVo.priceSort==''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">

          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total == 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->

          <article class="comm-course-list"  v-if="data.total > 0">
            <ul class="of" id="bna">
              <li  v-for="item in data.items" :key="item.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="item.cover" class="img-responsive" style="height:200px" :alt="item.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+item.id" :title="item.title" class="course-title fsize18 c-333">{{item.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green">
                      <i class="c-fff fsize12 f-fA" v-if="Number(item.price) === 0">免费</i>
                      <i class="c-fff fsize12 f-fA" v-else>¥{{item.price}}</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                        <i class="c-999 f-fA">{{item.buyCount}}人学习</i>
                        |
                        <i class="c-999 f-fA">{{item.viewCount}}评论</i>
                      </span>
                  </section>
                </div>
              </li>             
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a :class="{undisable:!data.hasPrevious}" href="#" @click.prevent="gotoPage(1)" title="首页">首</a>
            <a :class="{undisable:!data.hasPrevious}" href="#" @click.prevent="gotoPage(data.current-1)"  title="前一页">&lt;</a>
            <a v-for="page in data.pages" :key="page " href="#" :title="'第'+page+'页'" :class="{current:data.current == page , undisable:data.current == page}" @click.prevent="gotoPage(page)" >{{page}}</a>
            <a :class="{undisable:!data.hasNext}" href="#" @click.prevent="gotoPage(data.current)"  title="后一页">&gt;</a>
            <a :class="{undisable:!data.hasNext}"  @click.prevent="gotoPage(data.pages)"  href="#" title="末页">末</a>
            <div class="clear"></div>
          </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>

  import courseApi from '@/api/course'

  export default {
    data(){
      return{
        page:1,
        data:{},
        subjcetNestedList:[],
        subSubjectList:[],
        courseFrountVo:{},
        oneIndex:-1,
        twoIndex:-1,
        buyCountSort:"",
        gmtCreateSort:"",
        priceSort:""
      }
    },
    //异步调用,调用一次
    //params,相当于之前 this.$route.params.id 等价 params.id
    // asyncData({params,error}){
    //   return 
    // },
    created(){
      this.initCourseFirst()
      this.initSubject()
    },
    methods:{
 
      // 查询第一页数据
      initCourseFirst(){
        this.courseFrountVo={}
        this.courseFrountVo.buyCountSort = ""
        this.courseFrountVo.gmtCreateSort = ""
        this.courseFrountVo.priceSort= ""
        this.subSubjectList=[]
        this.oneIndex = -1
        this.twoIndex = -1
        courseApi.getCourseList(1,8,this.courseFrountVo)
        .then(res =>{
          this.data = res.data.data
        })
      },
      // 查询课程分类
      initSubject(){
        courseApi.getAllSubjcet().then(res =>{
          this.subjcetNestedList = res.data.data.list
        })
      },

      // 分页切换
      gotoPage(page){
        courseApi.getCourseList(page,8,this.courseFrountVo)
          .then(res =>{
            this.data = res.data.data
          })
      },
      searchOne(id,ind){
        this.oneIndex = ind
        this.courseFrountVo={}

        this.subSubjectList = this.subjcetNestedList[ind].children
        this.courseFrountVo.subjectParentId = id;
        this.courseFrountVo.buyCountSort = ""
        this.courseFrountVo.gmtCreateSort = ""
        this.courseFrountVo.priceSort= ""
        courseApi.getCourseList(1,8,this.courseFrountVo)
          .then(res =>{
            this.data = res.data.data
          })
      },
      searchTwo(id,ind){
        this.twoIndex = ind 
        this.courseFrountVo={}
        this.courseFrountVo.subjectId = id
        this.courseFrountVo.buyCountSort = ""
        this.courseFrountVo.gmtCreateSort = ""
        this.courseFrountVo.priceSort= ""
        courseApi.getCourseList(1,8,this.courseFrountVo)
          .then(res =>{
            this.data = res.data.data
          })
      },
      searchBuyCount(){
        this.courseFrountVo.buyCountSort = "1"
        this.courseFrountVo.gmtCreateSort = ""
        this.courseFrountVo.priceSort= ""
        courseApi.getCourseList(1,8,this.courseFrountVo)
          .then(res =>{
            this.data = res.data.data
          })
      },
      searchGmtCreate(){
        this.courseFrountVo.buyCountSort = ""
        this.courseFrountVo.gmtCreateSort = "1"
        this.courseFrountVo.priceSort= ""
        courseApi.getCourseList(1,8,this.courseFrountVo)
          .then(res =>{
            this.data = res.data.data
          })
      },
      searchPrice(){
        this.courseFrountVo.buyCountSort = ""
        this.courseFrountVo.gmtCreateSort = ""
        this.courseFrountVo.priceSort= "1"
        courseApi.getCourseList(1,8,this.courseFrountVo)
          .then(res =>{
            this.data = res.data.data
          })
      }
    }
  };
</script>
<style scoped>
  .active{
    background: #bdbdbd;
  }
  .hide{
    display: none;
  }
  .show{
    display: block;
  }


</style>